# Modbus RTU and Ascii RS485 commands on the same bus

**URL:** https://discourse.nodered.org/t/modbus-rtu-and-ascii-rs485-commands-on-the-same-bus/17900
**Category:** General
**Created:** [13 November 2019 15:07 UTC](https://discourse.nodered.org/t/modbus-rtu-and-ascii-rs485-commands-on-the-same-bus/17900 "2019-11-13T15:07:52Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![sTem](https://avatars.discourse-cdn.com/v4/letter/s/6bbea6/32.png) [@sTem](https://discourse.nodered.org/u/sTem)
#### Post date: [13 November 2019 15:07 UTC](https://discourse.nodered.org/t/modbus-rtu-and-ascii-rs485-commands-on-the-same-bus/17900/1 "2019-11-13T15:07:52Z")

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Hi,

We have a RS485 network with some Modbus RTU sensors and some anemometers that respond to a Asci telegram straight to the bus.

I'm looking to find a way to use both protocols on the same bus. So first pol all the anemometers then all the Modbus sensors.

When turning the Modbus RTU off manually I get the responses from the anemometers back fine.  
But when I turn on the Modbus RTU I see that the anemometers send their responses but I cannot read them. Probably because the Modbus node is blocking this or something.

Currently the anemometers are being polled with a python script but if I’m planning to migrate to node red for these also.  
De Modbus sensors work file trough node red.

Is there a way to turn of the Modbus node temporarily , send Asci messages through the Modbus node or send the Modbus trough the normal serial node?

Thanks

Sébastien